The line arresters can only protect the line insulators on the tower equipped with the line arresters from lightning flash and they have no extended protectiverange.
Finally, based on calculating the protectiverange of lightning rod, the importance of using early streamer emission lightning rod in important project was explained.
最后通过避雷针保护范围的计算，说明了在重要工程中采用提前放电式避雷针的重要意义。
3
As the protected object is within the safe protectiverange of the lightning arresters, the lightning fell within the safe lightning falling range will hit on the arresters.